Essays about: "Acoustic"

Showing result 1 - 5 of 332 essays containing the word Acoustic.

  1. 1. Efficient Energy Use of FPGA for Underwater Sensor Network

    University essay from Linköpings universitet/Elektroniska Kretsar och System; Linköpings universitet/Elektroniska Kretsar och System

    Author : Erik Amgård; Kevin Bergman; [2019]
    Keywords : Underwater Sensor Network; FPGA; FFT; VHDL;

    Abstract : Operational time is becoming an increasingly important aspect in electronic devices and is also highly relevant in Underwater Acoustic Sensor Networks (UWSN). This thesis contains a study which explores what can be done to de-crease power consumption while maintaining the same functionality of an FPGA inside an underwater sensor-node network. READ MORE

  2. 2. Beamforming and Blind Signal Separation for Far-field Voice Capture using a Microphone Array

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Luke Postema; Johan Davidsson; [2019]
    Keywords : Beamforming; Microphone array; Minimum variance distortionless response; delay-and-sum; direction of arrival; blind signal separation; Technology and Engineering;

    Abstract : With the evolving technology of mobile electronics and other forms of communication methods, an increasing demand of speech intelligibility is introduced. In a conference room for example, multiple microphones are placed directly in front of the speaker in order to pick up clean speech. However, several challenges still exist. READ MORE

  3. 3. Non-destructive Evaluation of Ultrasound Contrast Agent

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Wendi Löffler; [2019]
    Keywords : ultrasound; microbubbles; contrast agent; attenuation; phase velocity;

    Abstract : Clinical ultrasound imaging techniques can be greatly improved by the use of ultrasound contrast agents (UCAs). While microbubbles (MBs) without shell are unstable and cannot be used for practical applications,a shell produced from biocompatible polyvinylalcohol (PVA) significantly improves chemical versatility and stability. READ MORE

  4. 4. Recording and amplifying of the accordion : What is the best way to capture the sound of the acoustic accordion?

    University essay from Kungl. Musikhögskolan/Institutionen för klassisk musik

    Author : Milan Řehák; [2019]
    Keywords : Accordion; recording; amplifying; microphones; studio; live music;

    Abstract : In this thesis I discuss, analyse and intend to answer the question: What is the best way to capture the sound of the acoustic accordion? It was my desire to explore this theme that led me to this research, and I believe that this question is important to many other accordionists as well. From the very beginning, I wanted the thesis to be not only an academic material but also that it can be used as an instruction manual, which could serve accordionists and others who are interested in this subject, to delve deeper into it, understand it and hopefully get answers to their questions about this subject. READ MORE

  5. 5. Acousto-Electromagnetic Interaction in Materials for Aerospace Composites

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Niklas Wingren; [2019]
    Keywords : Non-destructive testing; Ultrasound; mm-waves; Photoelasticity; Multiphysics; Technology and Engineering;

    Abstract : Non-destructive testing (NDT) is a vital part of aerospace manufacturing due to high demands for quality and safety. Advances in materials science have given rise to aerospace composites with highly improved properties compared to traditional materials. READ MORE